Multiple horizon shading

[a.zurcher]

Hi,

I would like to model a solar thermal system with one array facing south and another facing east but connected to the same hot water tank, which means that the horizon shading is very different for each array, but it seems like I can only edit the horizon shading for the complete project ?

Is there a way to assign a different horizon shading to a specific system component ?

Thank you for your help,

Antoine